Door-fastener



(No Model.)

A. KENNEDY.

DOOR PASTENER. No. 470,857. Patented Mar. 15, 1892.

UNITED STATES PATENT FFICE.

ALEXANDER KENNEDY, OF ASHLAND, KENTUCKY.

DOOR-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 470,857,dated March 15, 1892.

Application filed November 28 1891. Serial No. 413,418. (No model.)

To all whom it may concern.-

Be it known that I, ALEXANDER KENNEDY, a citizen of the United States, residing at Ashland, in the county of Boyd and State of Kentucky, have invented certain new and useful Improvements in Door-Fasteners; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of doorfasteners designed for securing doors in a partially-open position; and it has for its object to provide a simple and improved device of this character of inexpensive and durable construction, and which is, furthermore, adjustable for purpose of regulating the play of the door'or for lockingthe latterin closed position.

To this end my invention consists, substantially, in the construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the claims.

In the drawings, Figure 1 is a perspective,

View illustrating the application ofmy invention and also showing the adjustment of the latter. Fig. 2 is a longitudinal sectional view of the device detached. Fig. 3 is a transverse sectional view of the elongated plate. Fig. 4 is a detail perspective view of the securingplate with the chain in engagement therewith.

Corresponding parts in the figures are denoted by the same letters of reference.

Referring to the drawings, A designates the securing-plate, which is preferably cast of metal in circular form, hollow, and provided with a peripheral securing-flange or, having apertures a for the reception of securingscrews. The plate A is provided with oppositely-disposed apertures b, arranged above the flange a and designed for the passage and play of a chain 13. At one end of the latter is secured a hook O, the base of which being of greater diameter than the apertures b, whereby the said chain when draft is applied at its opposite end is locked against withdrawal from the securing-plate, as clearly shown in Fig. 4.

D designates an elongated plate, preferably cast of metal and formed with a centrallydisposed longitudinal rib d, projecting out an approximately V-shaped enlargement e,

having its apex intersecting the slot.

For connecting the plates A and D together through the medium of the chain B, I provide an anchor F, adapted to be locked and slide in the slot E. This anchor consists of a bar f, provided at its end nearest the plate A with an eye f, through the medium of which the chain is attached to the anchor. At the opposite end of the bar f is formed a lug G at right angles thereto. its point of intersection with the bar f to form an enlarged free end of greater diameter than the outer opening of the slot E. The lug G is approximately triangular in cross-section and corresponds to and is adapted to be received by the enlargement. The chain B is preferably constructed of approximately U- shaped links provided at their free ends with eyes adapted to receive the closed end of the next adjoining link. By this construction the chain comprises a series of cross-bars s, with which the hook O is adapted to engage, the purpose of which will hereinafter appear.

The operation and advantages of my invention will be readily understood by those skilled in the art to which it appertains. In practice the plate A is secured adjacent to the door in such manner that the chain B is adapted to play in a horizontal direction, the end of the chain carrying the hook being farthest from the door. The plate D is secured in alignment with the plate A and with the end of the slot E having the enlargement e farthest from the plate A. The plate D is also arranged relative to the plate A in such manner that when the chain is extended to its greatest length the lug of the anchor F will coincide with the enlargement of the slot E when the door is closed.

In operation when it is desired to lock the door in partially-open position thelug of the The lug G flares from too anchor F is passed through the enlargement e while the door is closed and then slid forwardly in the slot E, being thus locked in engagement with the plate D. When so arranged, the door can be opened or remain open a limited distance for purpose of ventilation or communication with the exterior of the apartment and the fastening can be in no manner disengaged from the exterior. To further limit the opening of the door, the hook O can be placed in engagement with any one of the chain-links and the chain thus shortened, and when it is desired to lock the door tightly closed the hook in like manner is placed in engagement with one of the chain links, so as to take up all slack of the chain.

I claim as my invention 1. In a door-fastener 0f the class described, the combination, with a securing-plate provided with an opening and an elongated plate provided with a longitudinal dovetail slot having an enlarged entrance-opening at its distal end, of an anchor adapted to be received by said enlarged opening and locked within the slot, a chain carrying said anchor and playing loosely within the opening of the securing-plate, and a hook secured at the free end of the chain and having a base of greater breadth than said opening, said hook being adapted to engage a link of the chain, sub stantially as and for the purpose set forth.

2. In a door-fastener of the class described, the combination, with a retaining-plate provided with a slot and a securing-plate provided with an opening extending therethrough, of an anchor adapted to be received by and retained in said slot, a single chain secured to the anchor and playing loosely in the opening of the securing-plate, and a hook carried at the free end of the chain and adapted to engage one of the links thereof, substantially as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

ALEXANDER KENNEDY.

W ituesses:

D. A. FISHER,

EEN. W. SINGER. 

